Abstract
The Ni(II) and Cu(II) complexes of four azo compounds (H2L1–4), namely, 2-(p-X-phenylazo)-4-acetamidophenol (X=OCH3, NO2, Br, and H for H2L1, H2L2, H2L3, and H2L4, respectively) were prepared and characterized on the basis of their analytical, spectroscopic, magnetic, and conductance data. The isolated complexes are found to have the general formulae [M(HL1–4)Cl(H2O)3] (M=Ni(II) and Cu(II)). The chelates are found to have octahedral structure. The infrared spectra show that H2L1–4 ligands are coordinated to the metal ions in a uninegative bidentate manner, with NO donor sites of the azo N and the deprotonated phenolic O. The ligands and their chelates are subjected to thermal analysis. The biological activity of the synthesized ligands and their metal complexes also are screened against the adult Tribolium confusum mortality. They showed remarkable biological activity.
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